Ironically, Dr Who had never touched a "time paradox" story before, and so Day of the Daleks, a cleverly scripteed and handsomely produced story, is thus especially satsifying. The future earth scenario is beleivably downbeat, and the polished metallic sets are excellent. Acting is top-drawer too, with honours going to Aubrey Woods as the oily Controller, a scheming puppet dictator with a vestige of humanity at his core. The gradual realization that the rebels are trapped in a time loop of their own making is extremely effective and leads to all sorts of weighty questions about cause and effect that would be revisited years later with the Terminator films. The letdowns of course are the daleks - static, poorly vocalised, and few in number, they are a pale shadow of their 1960s selves. However, the clever and engaging script and introduction of the wonderful ogrons as the daleks' "guard dogs" to the series make this a very enjoyable story.